However, it should be noted that the number of speakers used for a surround sound system is not defined by the impedance of the speakers. The purpose of the speakers in a surround sound system is to recreate a multichannel audio experience. This is achieved by using a combination of multiple amplifiers and speakers, which are strategically positioned around a listener to create a soundstage that immerses the listener in the audio.
Most of the AV receivers can handle speakers between 4 to 16 Ohms. It’s the wattage you must be careful of. However, not all speakers are compatible with all amplifiers. It is important to check the specifications of both the amplifier and the speakers to ensure that they are compatible before connecting them. For instance, an amplifier rated for a minimum speaker impedance of 8 Ohms will not be able to drive a pair of 4-Ohm speakers without potentially causing damage to the amplifier or the speakers.